DIY window insulation film
Do it yourself window insulation kits consist of clear plastic film that is attached to the window sash or frame using double-sided, adhesive tape. They only cost a fraction of the price of double-glazing, but offer good performance in reducing heat loss and condensation.
The film is designed to only last one heating season and then be removed but it may remain intact for several years if the windows are in good condition and the film is left undisturbed. Keep in mind that the adhesive tape used on the film may leave a stain if left on for longer than one season.
DIY window insulation kits may not be suitable:
- where children or pets are likely to damage the film
- where maintaining a crystal-clear view is important
- where wooden frames are in poor condition, leak or are damp
- where wooden frames have flaking paint
- where the distance between the internal surface of the window frame and the glass pane is less than 5mm.
DIY window insulation kits are available from many hardware stores and some online shops.
Tips for installing
Installation of the film is relatively easy and only requires a pair of scissors and a hair dryer. To avoid condensation forming inside the air gap, wooden frames must be dry, not leak when they get rain on them and the paint must be in good condition. A good seal must be formed when attaching the film so take care to get it stuck down to the window frame all the way around.